Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb58cbaf1c3c867a…

MALICIOUS

PDF

65.6 KB Created: 2020-12-23 14:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 82b2c6b214625c505c6b01feac1b5926 SHA-1: 1800fa8006ee3b05316ae3a92198d7323ff3a239 SHA-256: cb58cbaf1c3c867adf16521f03ea860ec32a19302e937166fe682c5f40b6a5b9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/strik?utm_term=vanilla+ice+cream+and+chocolate+cake PDF link annotation
    • https://jenevokitajawol.weebly.com/uploads/1/3/4/2/134235402/7b977c9b1a4.pdfIn PDF document text
    • https://wizodorifezeniv.weebly.com/uploads/1/3/4/7/134715638/nufowefoxumefobatini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5faf57a1d0884.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/megazirenogetu_kejufavum.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/fuwudupimaworek.pdfIn PDF document text
    • https://mopepeserowote.weebly.com/uploads/1/3/4/6/134621402/nogewax-xivegupikitiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f033fbd7-b660-4cdc-bba0-5fe410f366cb/fidemom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b025f9-0fbb-4186-a4e2-8610faf0f250/zijazupujoruwamazeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bb95ff-51a3-455d-b35a-ae12d2ce3c93/xoxejol.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/61418319507.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/86618706258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05dba3-6797-4e8d-9eb5-d1de059e36e2/pebedafokowijuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1d1578-f4fa-4590-a165-ae7eced4a727/mokshagundam_visvesvaraya.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/manual_microondas_de_embutir_brastemp_gourmand.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/franklin_templeton_india_fact_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/molexoxenatixetakibesug.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 5032 bytes
SHA-256: f5cc6b017d91c29bdbcca9949a73b87ed1847fe2cb578c53f8fe5ceccf4b4648
font_01_sfnt_off0000d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79F 9836 bytes
SHA-256: 2377f2f7d075bcf2961683cb588a1dfbb8386f8f0cabd9266a24351bf5fa61a7

Open this report in the interactive analyzer, or submit your own file for analysis.